[LTP] [PATCH v2 1/8] Rewrite userns01.c using new LTP API

[Petr Vorel]

Hi Andrea,

Reviewed-by: Petr Vorel <pvorel@suse.cz>

nit: I'd sometimes use underscore to make names more readable
i.e. update_map, parent_map_pid, OVERFLOW_UID_PATH, OVERFLOW_GID_PATH

> +static inline int check_newuser(void)
> +{
> +	int pid, status;
> +
> +	if (tst_kvercmp(3, 8, 0) < 0)
> +		tst_brk(TCONF, "CLONE_NEWUSER not supported");
Is this limitation needed, when we have the same check with ltp_clone_quick()?
> +
> +	pid = ltp_clone_quick(CLONE_NEWUSER | SIGCHLD, dummy_child, NULL);
> +	if (pid == -1)
> +		tst_brk(TCONF | TTERRNO, "CLONE_NEWUSER not supported");
> +
> +	SAFE_WAIT(&status);
> +
> +	return 0;
> +}
> +
> +static inline void updatemap(int cpid, bool type, int idnum, int parentmappid)
> +{
> +	char path[BUFSIZ];
> +	char content[BUFSIZ];
> +	int fd;
> +
> +	if (type == UID_MAP)
> +		sprintf(path, "/proc/%d/uid_map", cpid);
> +	else if (type == GID_MAP)
> +		sprintf(path, "/proc/%d/gid_map", cpid);
> +	else
> +		tst_brk(TBROK, "invalid type parameter");

nit: maybe switch would be more readable.

...

Kind regards,
Petr